They have 7 samples on Vimeo to show different what type of footage different options will produce. (http://vimeo.com/meltingbloke/albums)
I haven't compared them all but the oners I looked at had some cool stuff going on, definately more organic feeling than modern lenses.

The best thing (well .. one of the best things) about them is the price, about $180 CDA shipped. That's cheaper than a lens baby.

For me these will look way cooler on your camera and produce images at least as cool as a lens baby, and they seem like they may be more suited to video then lens baby.***

I haven't orderd one, but after reading the FAQ's Sheet, I am seriously thinking about getting one.
If they where from a big company I'd probably say "It's a gimmick", because it is, but because they are hand made by a small (I assume) operation I somehow find them cooler.

***I like lense baby and think they have are a neat tool. I just thnk these have more "coolness"